The European Space Agency’s Rosetta comet-chaser mission will help scientists unlock the mysteries of the oldest building blocks of our Solar System, the comets. Launched in March 2004 the spacecraft has spent the last 10 years journeying around the solar system and will arrive at comet 67P/Churyumov–Gerasimenko in August 2014. There it will perform extensive observations of the comet and, on or about 11 November, will deploy the Philae lander to the surface.